JPS6314580B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor including a stator comprising a cylindrical core and a plurality of coils, and a rotor paired with the stator, and a method for manufacturing the same.

For example, in an outer rotor type DC brushless motor, a pair of cylindrical bobbin bodies each having a plurality of protrusions for coil winding protruding radially on the outer periphery is conventionally provided. A slotless cylindrical core is inserted between the protrusions to form a bobbin, and in this state a coil is wound between the protrusions to connect the coil and core to a rotor made of permanent magnets. The configuration is such that they are placed facing each other. However, in such a conventional configuration, since the cylindrical bobbin bodies that form the bobbin are provided with different shapes, there is a problem that the number of types of parts increases, and furthermore, it is difficult to apply to cores with different diameter dimensions. Therefore, when manufacturing various types of motors, it is necessary to provide bobbins of different shapes for each type, resulting in a problem that the number of types of parts increases.

The present invention has been made in response to the above-mentioned circumstances, and its purpose is to provide only one type of strip-shaped coil support piece as a component for coil winding, and to connect the coil support piece to cores with different diameters. It is also possible to use common parts for many types of motors, thereby reducing the number of parts and making it possible to easily manufacture many types of motors. In addition, it is an object of the present invention to provide a motor that can be constructed so that the shape of the core does not become complicated, and a method for manufacturing the same.

Hereinafter, each embodiment in which the present invention is applied to an outer rotor type DC brushless motor will be described with reference to the drawings.
Explain according to the diagram. In FIG. 1, reference numeral 1 denotes a base portion formed by integrally protruding a hollow cylindrical portion 2, which includes a cylindrical case 3 surrounding the hollow cylindrical portion 2.
is installed and fixed. Reference numeral 4 denotes a rotary shaft that penetrates the hollow cylindrical portion 2 and is rotatably supported via bearings 5, 5, and a rotor 6 and a pulley 7 are provided at the bottom of the rotary shaft.
is fixed. The rotor 6 is composed of a bottomed cylindrical yoke 8 located inside the case 3, and permanent magnets 9 arranged on the inner peripheral surface of the yoke 8 at a predetermined pitch. 10 is a stator which is an armature fixed to the outer periphery of the hollow cylinder part 2;
This will be discussed below. Reference numeral 11 denotes a cylindrical core, and as shown in FIG. 2, a plurality of pairs of, for example, six pairs of notches 12a and 12b are vertically opposed to each other on the upper and lower edges 11a and 11b, which are both axial edges. It is formed to do so. Reference numeral 13 designates a plurality of, for example, six strip-shaped coil support pieces (only one is shown in Figure 2), which are integrally molded from an insulating elastic material such as plastic; It has the shape shown in . That is, the coil support piece 13 is configured such that the main body portion 14 having a strip shape is formed to have an arc-shaped cross section, and the curvature of the outer surface of the main body portion 14 matches the curvature of the inner circumferential surface 11c of the core 11. Projections 15 and 1 are formed from the upper and lower parts of the outer surface of the main body 14, respectively, which are spaced apart from each other.
6 are formed in a protruding manner, and grooves 17 and 18 are provided at mutually opposing portions of the proximal ends of the respective protrusions 15 and 16.
is engraved. A projecting piece 19 is formed protruding from the lower part of the inner surface of the main body part 14, and a stepped part 20 is formed on the outer surface of the upper end part of the main body part 14 by making this part thinner than the other parts. has been done. The coil support piece 13 is attached to the core 11 as shown in FIG. 3. In this case, the coil support piece 13 is first attached to the core 1
1, the main body part 14 is moved to the second
The upper groove 17 is warped and deformed as shown by the two-dot chain line in the figure, and the upper groove 17 is engaged with the notch 12a, and the lower groove 18 is connected to the notch 1 that pairs with the notch 12a.
2b. As a result, each coil support piece 1
3 are circularly arranged on the inner circumferential surface 11c of the core 11 so as to extend in the axial direction (vertical direction in the figure), and the protrusions 15 and 16 respectively have on the outer circumferential surface 11 of the core 11.
d, and the positioning of the coil support piece 13 at this time is determined by the grooves 17,
18 and the notches 12a, 12b are engaged with each other. As described above, a plurality of coils 21 (only one is shown in FIG. 1) are wound around the radially protruding protrusions 15 and 16, thereby forming the stator 10. When fixing the portion 2 to the outer periphery, its position in the axial direction is achieved by abutment between the protruding piece 19 and the lower end of the hollow cylindrical portion 2.

Reference numeral 22 denotes a printed circuit board which is fixed in advance by being fitted onto the outer periphery of the upper end of the coil support piece 13 arranged in a circular manner until it comes into contact with the stepped portion 20. A position detecting device 24 consisting of a magnetic sensor 23 and the like is provided, and the position detecting device 24 detects the rotational position of the rotor 6 by the magnetic sensor 23 and detects the rotational position of the plurality of coils 21 according to the detected output. The configuration is such that the power is applied in a predetermined order. Then, by energizing the coil 21, the stator 10 and the rotor 6
A torque is generated between the rotor 6 and the permanent magnet 9, thereby rotating the rotor 6 in a predetermined direction.

Next, a second embodiment of the present invention will be described with reference to FIG. 4, with only the differences from the first embodiment described above.
That is, 25 is a cylindrical core, which has a simple shape without the cutouts 12a and 12b as in the first embodiment. Further, 26 is a rotary arm for feeding out the coil wire 24a of a winding machine 27 of a well-known configuration, and 28 is a fixing jig for the winding machine 27. It has, for example, six elongated protrusions 29. Thus, the six coil support pieces 13 are arranged on the inner circumferential surface 25a of the core 25 so as to extend in the axial direction, and at this time, the protrusions 15, 16 of the coil support pieces 13 are disposed while warping and deforming the main body 14. The grooves 17 and 18 at the base end of the core 25 are engaged with the upper end edge 25b and the lower end edge 25c, which are both axial ends of the core 25, respectively, to integrate them, and the integrated product is fixed to the fixing jig 2.
Fixed at 8. During such fixing, the fixing jig 28 is inserted into the core 25, but when inserted, the protrusion 29 on the outer periphery of the fixing jig 28 may enter between adjacent coil support pieces 13 (particularly the main body 14). The position of each coil support piece 13 is determined by the following steps. Then, with the coil support piece 13 positioned in this manner, the coil wire 24a is attached to the predetermined protrusions 15 and 16.
That is, the coil 24 is wound.

According to the present invention described above, the following effects can be obtained. That is, it is only necessary to provide a plurality of strip-shaped coil support pieces having the same shape as parts for coil winding, and the number of types of parts can therefore be reduced. Moreover, even if the cores have different diameter dimensions, if their axial dimensions are the same, coil support pieces of the same shape can be used in common.
It is possible to standardize parts among many types of motors, and when manufacturing many types of motors, the number of parts types can be further reduced, and manufacturing becomes easier. Further, it is also possible to perform positioning between the core and the coil support piece without providing a positioning notch in the core, and therefore it is also possible to configure the core so that the shape does not become complicated. Become.

[Brief explanation of the drawing]

1 to 3 relate to a first embodiment of the present invention, in which FIG. 1 is a side view of the left half section, FIG. 2 is a perspective view of the coil support piece and core, and FIG. 3 is a perspective view of the coil support piece and core. FIG. 4 is a perspective view of the coil support piece and the core in an integrated state, and FIG. 4 is a perspective view of essential parts in a second embodiment of the present invention. In the figure, 6 is the rotor, 10 is the stator, 11 is the core, 11a and 11b are the upper and lower edges (both axial edges), 11c is the inner peripheral surface, 12a and 12b are the notches, and 13 is the coil support piece. , 15, 16 are protrusions, 1
7 and 18 are grooves, 21 is a coil, 25 is a core, 2
5a is an inner circumferential surface, 25b and 25c are upper and lower end edges (both axial end edges), 27 is a winding machine, 28 is a fixing jig, and 29 is a protrusion.

Claims (1)

[Scope of Claims] 1. In a motor comprising a stator comprising a cylindrical core and a plurality of coils wound around the core, and a rotor paired with the stator, both axial edges of the core A plurality of rectangular coil support pieces are provided, each having a plurality of pairs of notches formed in the portion thereof, and a plurality of rectangular coil support pieces having a pair of spaced apart protrusions for winding the coil, and the coil support pieces are arranged on the circumferential surface of the core. In addition, the motor is characterized in that, at this time, each base end of the pair of protrusions is engaged with the pair of notches for positioning. 2. A method for manufacturing a motor comprising a stator consisting of a cylindrical core and a plurality of coils wound around the stator, and a rotor paired with the stator, the method comprising: A plurality of rectangular coil supporting pieces each having a pair of protrusions are provided, and the coil supporting pieces are disposed on the inner circumferential surface of the core. When the integrated product is installed by inserting the core into a fixing jig of a winding machine, the protrusion formed on the outer periphery of the fixing jig is used to support the coil. A method for manufacturing a motor, characterized in that the coil support piece is positioned by entering between the pieces.